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Etude des premiers stades de développement de la Coccidie Coelotropha durchoni

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Summary

This study considers the earlier growth stages of Coccidium Coelotropha durchoni in its host, Nereis diversicolor. Before evolving into free trophozoites and gamontes in coeliac fluid, the parasites remain in muscular and coeliac cells in microscopic intracellular form. Electron microscope reveals that these stages show an intermediary fine structure between that of a sporozoite — from which they keep some typical characteristics such as the conoid, the fibers and the involuted tubuli — and that of the future free trophozoites. The wall consisting in two clear membrans is provided with one or several micropores. The classical cytoplasmic organites clearly stand out: dictyosomes show constant relationship with ergastoplasm, the mitochondria contain short inner tubuli. Besides the paraglycogen granules and lipoid vacuoles, at least three types of vacuoles may be observed. Peculiar topographic relationship connects mitochondria and paraglycogen granules probably in formation. In the nucleus with classical membrane and heterogeneous structure, a rather voluminous nucleolus may be seen.

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  1. Laboratoire de Zoologie, Service de Protistologie et Microscopie électronique, Faculté des Sciences de Lille, Centre d'Etudes sur la Cellule, France

    Eliane Porchet-Hennere

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  1. Eliane Porchet-Hennere
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Porchet-Hennere, E. Etude des premiers stades de développement de la Coccidie Coelotropha durchoni . Z. Zellforsch. 80, 556–569 (1967). https://doi.org/10.1007/BF00330722

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  • DOI: https://doi.org/10.1007/BF00330722

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